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EP4389716A1 - Procédé de fabrication d'un matériau activé, utilisation du matériau dans un mélange de mortier sec, mélange de mortier sec comprenant le matériau, procédé de fabrication du mélange de mortier sec et son utilisation - Google Patents

Procédé de fabrication d'un matériau activé, utilisation du matériau dans un mélange de mortier sec, mélange de mortier sec comprenant le matériau, procédé de fabrication du mélange de mortier sec et son utilisation Download PDF

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Publication number
EP4389716A1
EP4389716A1 EP23213810.7A EP23213810A EP4389716A1 EP 4389716 A1 EP4389716 A1 EP 4389716A1 EP 23213810 A EP23213810 A EP 23213810A EP 4389716 A1 EP4389716 A1 EP 4389716A1
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EP
European Patent Office
Prior art keywords
dry
mortar mixture
grain
mortar
activated
Prior art date
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Pending
Application number
EP23213810.7A
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German (de)
English (en)
Inventor
Andreas Stumm
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Xella Baustoffe GmbH
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Xella Technologie und Forschungs GmbH
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Filing date
Publication date
Application filed by Xella Technologie und Forschungs GmbH filed Critical Xella Technologie und Forschungs GmbH
Publication of EP4389716A1 publication Critical patent/EP4389716A1/fr
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00517—Coating or impregnation materials for masonry
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
    • C04B2111/00672—Pointing or jointing materials

Definitions

  • the present invention relates to methods for producing an activated material for a dry mortar mixture, in particular a mineral one, the use of the material in a dry mortar mixture, in particular a mineral one, a dry mortar mixture with the material, a method for producing the dry mortar mixture and the use thereof.
  • Masonry mortars are usually pre-mixed dry mortar mixtures (factory dry mortar). Dry mortar mixtures are prefabricated dry mixtures (so-called factory mortar) consisting of at least one, particularly mineral, binding agent, at least one aggregate, usually at least one additive and/or at least one admixture, which only need to be mixed with water on site to form a fresh mortar and are therefore ready for use.
  • At least one in the context of this application: If at least one component can be included, this means that a mixture of several of these components can also be included.
  • the dry mortar mixture is therefore preferably available as a loose bulk material. It is preferably delivered to the respective site of use, in particular the construction site, in bagged goods or as silo goods in a construction silo or dry mortar silo.
  • the dry mortar mixture can also be in the form of a dry mortar molded body, e.g. a pressed pellet.
  • Additives are finely distributed substances that influence certain properties of the mortar. They primarily affect the workability of the fresh mortar and the strength and density of the hardened mortar. In contrast to admixtures the amount added is generally so large that it must be taken into account in the volume calculation. Additives must not affect the hardening of the cement or the strength and durability of the mortar.
  • inactive additives in particular pozzolanic additives and latent hydraulic additives, and organic additives.
  • Inert additives do not react with the binder or at most react superficially.
  • the active additives are included in the binder portion if they contribute to the formation of the binder matrix.
  • the setting regulator is also included in the binder portion.
  • Additives are standardized, for example, in DIN EN 12620:2015-07 “Natural mineral flour” or DIN EN 15167-1:2006-12 "Ground granulated blast furnace slag for use in concrete, mortar and grout". Additives are part of the fine grain portion of the mortar.
  • fine grain or flour refers to all grains whose grain size is ⁇ 0.125 mm.
  • all inert components of the dry mortar mixture with a grain size ⁇ 0.125 mm are referred to as additives or are included in the additive portion.
  • Aggregates are also inert and coarser than additives.
  • Aggregates rock aggregate
  • all inert components of the Dry mortar mixtures with a grain size > 0.125 mm are referred to as aggregates or are included in the aggregate portion. It may be that a component with a corresponding grain distribution is partly included in the aggregate portion and partly in the additive portion.
  • Aggregates for mortar are standardized in DIN EN 13139:2013-07.
  • concrete is distinguished from mortar by the fact that it has at least one coarse aggregate with a grain size > 4 mm.
  • the aggregate in the mortar on the other hand, has a grain size of 4 mm at most.
  • Admixtures are added to the dry mortar to influence the properties of the fresh or hardened mortar - such as workability, setting, hardening, water absorption and water vapor diffusion or frost resistance - through chemical or physical effects or both. Admixtures are added in such small quantities ( ⁇ 5 mass % of the cement content) that they are insignificant as a proportion of the mortar. Admixtures are supplied in liquid, flour or powder form or as granules. In dry mortar mixtures they are contained in powder form or as granules. Admixtures for mortar are standardized, for example, in DIN EN 934-2:2012-08 "Admixtures for concrete, mortar and grout".
  • Masonry mortar is known to be used in particular for mortaring the bed joints and sometimes also the butt joints in masonry.
  • masonry mortar is used to produce bed joint mortar layers in masonry.
  • the requirements for masonry mortar are specified in DIN EN 998-2:2017-02.
  • the use of masonry mortar in buildings is regulated in DIN 20000-412:2019-06. This type of masonry mortar is also known as backing mortar.
  • Facing mortar is used for facing brickwork such as facing bricks, exposed brickwork or exposed joints.
  • Thin-bed mortar is used for plan stones, e.g. plan bricks, i.e. for masonry stones that have a small dimensional deviation in the stone height. It can also be used for laying tiles and slabs. Thin-bed mortar is usually processed in a joint thickness of 1-3 mm. Furthermore, thin-bed mortar has a maximum grain size of ⁇ 2 mm according to DIN EN 998-2:2017-02. According to the Model Administrative Regulation for Technical Building Regulations (MVV TB), edition 2021/1, thin-bed mortar even only has a maximum grain size of ⁇ 1 mm when used in Germany.
  • VMV TB Model Administrative Regulation for Technical Building Regulations
  • Lightweight masonry mortar contains lightweight aggregates such as expanded perlite, expanded clay, expanded glass or pumice.
  • the dry bulk density of lightweight masonry mortar is ⁇ 1.5 kg/dm 3 .
  • DIN EN 998-2:2017-02 and DIN 20000-412:2019-06 lightweight masonry mortar is divided into different mortar groups in ascending order of strength. Normal masonry mortar therefore has a dry bulk density ⁇ 1.5 kg/dm 3 .
  • Plaster mortars are standardized in DIN EN 998-1:2016. Plasters are known to form a coating on the external or internal walls or ceilings of a building. Several plasters can be arranged on top of each other, for example at least one base coat and at least one top coat.
  • the plaster mortar is mixed with water to form a fresh mortar and applied to the respective substrate. This can be done mechanically or by hand.
  • the fresh mortar is applied mechanically on the construction site using a plastering machine or mixing machine and a spray nozzle.
  • the plastering machine or mixing machine is mounted, for example, on at least one construction silo or dry mortar silo containing a dry plaster mortar mixture.
  • Aerated concrete material consists of hydrothermally hardened, porous Calcium silicate hydrate material. It is made from an aqueous mixture or fresh concrete mass which contains at least one CaO component that is reactive in the hydrothermal process and at least one SiO 2 component that is reactive in the hydrothermal process, a blowing agent, in particular aluminum powder and/or paste, and optionally additives, in particular inert ones.
  • the fresh concrete mass often contains at least one additive, e.g. a flow agent and/or a dispersant.
  • the pourable or ready-to-pour fresh concrete mass is poured into a mold, allowed to expand and stiffen, cut and then subjected to steam hardening.
  • aerated concrete material does not contain coarse aggregates with a grain size > 2.0 mm.
  • prefabricated foam is mixed into the fresh concrete mass instead of the foaming agent, or the fresh concrete mass containing a foaming agent is foamed directly by stirring and then the pourable or ready-to-cast fresh concrete mass is poured into the mold. In each case, the foaming process is omitted.
  • Conventional porous and foam concrete molding material therefore essentially consists of a solid web structure, which generally consists mainly of calcium silicate hydrate phases (CSH phases).
  • CSH phases calcium silicate hydrate phases
  • Mainly means that the solid web structure consists of more than 50% by mass of the CSH phases in relation to its dry mass.
  • the solid web structure can also contain, for example, residual quartz grains and, if necessary, the inert additives.
  • the residual quartz grains and the inert additives are embedded in the CSH phases.
  • the solid web structure has micro-, gel- and nanopores that are embedded in the CSH phases. are embedded or distributed in them.
  • the nano-, gel- and micropores are part of the solid web framework.
  • the CSH phases of the solid web framework thus function as a binding phase in the solid web framework. They are mostly cryptocrystalline to crystalline, usually CSH(I) and mainly 11 ⁇ tobermorite.
  • Aerated or foam concrete blocks are building blocks made of aerated and foam concrete material.
  • the generally unreinforced aerated or foam concrete blocks are mainly used as masonry blocks. Depending on the manufacturing tolerances, they are also referred to as aerated or foam concrete blocks or blocks.
  • waste material is usually produced that is used in the production of new aerated or foamed concrete material, in particular new aerated or foamed concrete blocks. To do this, it is mechanically crushed to a grain size of ⁇ 2 mm and then added to the fresh concrete mass. Mechanical crushing is usually carried out using a jaw crusher.
  • the EN 10 2006 049 836 A1 discloses, for example, the production of a hydraulic binder from construction waste, e.g. for the production of hydrothermally produced building materials, such as aerated concrete or sand-lime brick.
  • the construction waste contains calcium silicate hydrates or cement stone as a binding phase and additives.
  • fillers are separated and the remaining material is thermally treated to form a hydraulically active phase.
  • the construction waste is crushed to a grain size of ⁇ 10 mm, and the binding phase of the Construction waste is then heated to 600 to 800 °C for a period of 0.25 to 10 hours.
  • the binder-rich fine fraction is obtained by sieving and/or classifying a grain fraction smaller than 0.063 mm from the construction waste crushed to grain sizes ⁇ 10 mm.
  • the construction waste may also include aerated concrete rubble.
  • the hydraulic binder is also used, for example, alone or in a mixture with fillers in earthworks and foundation engineering for damming, filling cavities, in road and path construction for soil stabilization, soil improvement or soil consolidation and as a special binder. It can also be used as a base material for the production of a fine binder.
  • the CN113213846A discloses a masonry mortar that contains crushed, calcined and ground aerated concrete powder. During the crushing process, aerated concrete granulate with a grain size of ⁇ 0.16 mm is initially produced. The subsequent calcination for 4 to 6 hours at 700 to 900 °C and grinding to preferably ⁇ 0.045 mm activates the aerated concrete powder and can replace cement.
  • the masonry mortar also contains Portland cement and can contain additives such as expanded perlite and/or ceramic sand and/or blast furnace slag quenched with water.
  • the masonry mortar can also contain hydroxypropylmethylcellulose and/or latex powder and/or air entraining agents as additives.
  • the CN111439964A discloses a dry mortar mixture with aerated concrete waste, which is ground and a grain fraction with a grain size ⁇ 45 ⁇ m is sieved and then thermally treated at 700 to 900°C.
  • the DE 20 2018 105 762 U1 discloses a concrete mixture in which the hydraulic binder is replaced up to 25 % by aerated concrete waste ⁇ 800 ⁇ m, which has a sieve residue on a 45 ⁇ m sieve of ⁇ 50 % and consists of from the dedusting of aerated concrete recycling plants.
  • the concrete mixture also contains natural aggregates of grain sizes 0/4, 4/8, 8/16, 16/32.
  • An insulating mortar for a floor insulation layer which contains aerated concrete material crushed to ⁇ 1 mm or aerated concrete grains with a grain size of ⁇ 5 mm.
  • the CN103951340B discloses a repair mortar for aerated concrete slabs comprising aerated concrete waste ground into powder.
  • the RU 2010144708 A discloses a dry mortar comprising crushed aerated concrete waste having a sieve residue at 2.5 mm of ⁇ 1.5%.
  • Dry mortar moldings are produced, e.g. for the production of thin-bed mortar, which contain aerated concrete granulate as a pressing aid with grain sizes of up to 1 mm.
  • the residual moisture of the aerated concrete granulate is ⁇ 0.3 wt.%.
  • the CN 101781109 B discloses a dry mortar with aerated concrete waste that was crushed to 0.1 - 5 mm and dried in a drum hot air dryer.
  • a mortar composition which contains ground aerated concrete material with a grain size of ⁇ 0.5 mm.
  • the CN106116359A discloses a repair mortar for aerated concrete slabs using aerated concrete waste ground into powder.
  • the CN103613341A discloses a dry mortar mixture with ground aerated concrete waste having a grain size of 60-120 mesh (125 - 250 ⁇ m).
  • the CN103553488A discloses a masonry mortar based on aerated concrete slag.
  • the masonry mortar contains aerated concrete material crushed to 0 - 2.5 mm.
  • the object of the present invention is to provide methods for producing a material for a factory-mixed dry mortar mixture which has good processing properties and ensures good mortar strengths.
  • activated material which is produced by dry grinding a starting grain comprising at least one porous or foam concrete grain, can significantly improve the strength of a dry mortar mixture without, however, increasing the solid mortar density to the same extent.
  • the activated material then comprises at least one activated porous and/or foam concrete material.
  • grinding is continued until the true density of the activated material, determined by means of helium pycnometry, is at least 0.2 g/cm 3 higher than the true density of the starting grain.
  • the true density of the initial grain and the activated material is determined.
  • the true density is determined according to helium pycnometry in accordance with DIN 66137-2:2019-03 and measuring arrangement 2. For the sake of clarity, only the standard is given below.
  • the true density of the activated material determined by helium pycnometry according to DIN 66137-2:2019-03, is 0.2 to 0.4 g/cm 3 , preferably 0.3 to 0.4 g/cm 3 , higher than the true density of the starting grain.
  • grinding is continued until the true density of the activated material, determined according to DIN 66137-2:2019-03, is 2.4 to 2.6 g/cm 3 , preferably 2.5 to 2.6 g/cm 3 .
  • grinding is carried out until the activated material has a Blaine value, determined according to DIN 196-6:2019-03, of 13 000 to 22 500 cm 2 /g, preferably 14 000 to 22 000 cm 2 /g, particularly preferably 14 000 to 21 500 cm 2 /g.
  • the dry mortar mixture comprises the at least one activated porous or foam concrete material in a total amount of activated porous and/or foam concrete material of 5 to 25 mass-%, preferably 9 to 15 mass-%.
  • the activated material is used according to the invention in a dry mortar mixture, preferably a dry masonry mortar mixture, in particular a thin-bed mortar mixture according to DIN EN 998-2:2017-02 or the Model Administrative Regulation for Technical Building Regulations (MVV TB), edition 2021/1.
  • a dry mortar mixture preferably a dry masonry mortar mixture, in particular a thin-bed mortar mixture according to DIN EN 998-2:2017-02 or the Model Administrative Regulation for Technical Building Regulations (MVV TB), edition 2021/1.
  • the activated material can also be used advantageously in a dry plaster mortar mixture.
  • the dry mortar mixture comprises, in a manner known per se, a binder component with at least one mineral, preferably hydraulic, binder, at least one, preferably mineral, aggregate, preferably at least one inactive additive and preferably at least one admixture and, according to the invention, at least one activated porous or foam concrete material.
  • the starting grain for producing the activated porous and/or foam concrete material preferably contains at least one porous or foam concrete grain with a d 90 value ⁇ 10 mm, preferably ⁇ 5 mm, particularly preferably ⁇ 2 mm.
  • the d 90 value is determined for porous or foam concrete grains with a maximum grain size > 2 mm by means of sieve passage in accordance with DIN EN 1015-1:2007-05 and for porous or foam concrete grains with a maximum grain size ⁇ 2 mm by means of laser light diffraction in accordance with ISO 13320:2020-01.
  • the porous or foamed concrete grain preferably has a maximum grain size of ⁇ 12 mm, preferably ⁇ 6 mm, particularly preferably ⁇ 3 mm.
  • porous or foam concrete grain is preferably coarse-grained, i.e. it also has grains with a grain size > 125 ⁇ m.
  • the porous or foam concrete grain therefore has a coarse grain proportion.
  • the starting grain also contains only or exclusively at least one porous and/or foam concrete grain and no other components.
  • the proportion of porous and/or foam concrete grain in the starting grain is thus 100 mass%, based on the dry mass of the starting grain. This starting grain is thus ground to pure activated porous and/or foam concrete material.
  • the starting grain comprises at least one further component of the dry mortar mixture, preferably at least one binder and/or the binder component. This starting grain is thus ground to an activated mixture which contains at least one activated aerated or foamed concrete material.
  • the proportion of porous and/or foam concrete grains in the starting grain is preferably 60 to 90 mass-%, more preferably 70 to 85 mass-%, based on the dry mass of the starting grain.
  • the porous or foamed concrete grain preferably has a sulfate concentration ⁇ 600 mg/l, preferably ⁇ 100 mg/l, particularly preferably ⁇ 50 mg/l, sulfate in the eluate according to DIN EN 12457-4: 2003-01(DEV S 4).
  • a low sulfate content is advantageous because it prevents thaumasite-zetringite damage during the use phase.
  • the aerated or foamed concrete grain preferably has a bulk density of 400 to 700 g/l, preferably 450 to 600 g/l, according to DIN EN 1097-3:1998-06.
  • the aerated or foamed concrete grain is preferably a by-product from the aerated or foamed concrete production, which has preferably been mechanically crushed by means of a crusher to form the aerated or foamed concrete grain with the specified grain size.
  • the by-product is in particular technological breakage.
  • the aerated or foamed concrete grain is recycled material, which has also been mechanically crushed, preferably using a crusher, to form the aerated or foamed concrete grain with the specified grain size.
  • the recycled material can also be recarbonated. It is also known that it can contain adhering plaster and mortar residues.
  • the aerated or foamed concrete grains can also be produced by mechanical crushing of specially manufactured aerated or foamed concrete moldings.
  • it is aerated concrete material which has been produced according to the process according to EP 3 789 362 A1 or according to the WO 2009/121635 A1 (lime casting).
  • the porous or foamed concrete grain is first dried to a constant mass at a temperature of 100 to 300 °C, preferably 105 to 200 °C, in order to expel physically bound water.
  • the dry grinding of the mechanically crushed starting grain is also carried out in a mill, preferably in a drum mill, preferably in the form of a ball mill, and/or a roller mill.
  • the binder component preferably comprises a Portland cement (CEM I) according to DIN EN 197-1:2011-11 and/or a calcium sulfoaluminate cement and/or hydraulic lime and/or hydrated lime and/or a pozzolanic additive, preferably silica fume and/or fly ash and/or calcined clay, and/or a latent hydraulic additive, preferably granulated blast furnace slag.
  • CEM I Portland cement
  • Portland cement is known to contain Portland cement clinker and at least one setting regulator, in particular anhydrite and/or hemihydrate and/or gypsum.
  • Calcium sulfoaluminate cement accordingly contains calcium sulfoaluminate cement clinker and at least one such setting regulator. If other cements are used in accordance with DIN EN 197-1:2011-11 that contain inert additives in addition to Portland cement, these additives are counted as inert additives and not as part of the binder component.
  • the dry mortar mix contains a cement with high sulfate resistance according to DIN EN 197-1:2011-11.
  • hydraulic limes In addition to calcium hydroxide, hydraulic limes contain so-called hydraulic factors, such as silicates (e.g. SiO 2 ), aluminates (e.g. Al 2 O 3 ) and iron oxides (e.g. Fe 2 O 3 ) from which calcium silicates and calcium aluminates are formed.
  • silicates e.g. SiO 2
  • aluminates e.g. Al 2 O 3
  • iron oxides e.g. Fe 2 O 3
  • the hydraulic part of the binding agent can also harden under water, since no access of carbon dioxide is necessary.
  • the total proportion or total amount of binder in the dry mortar mixture is 20 to 40, preferably 30 to 40 mass-%.
  • the dry mortar mixture preferably contains 20 to 40 mass-%, more preferably 30 to 40 mass-% binder, based on the dry mass of the dry mortar mixture.
  • the quantities given for the dry mortar mix always refer to the dry mass of the dry mortar mix, even if this is not explicitly mentioned.
  • grain sizes are always determined by determining the sieve passage according to DIN EN 1015-1:2007-05, even if this is not explicitly mentioned.
  • the at least one aggregate is preferably a normal aggregate, preferably quartz sand.
  • the dry mortar mixture can also contain at least one lightweight aggregate.
  • the at least one lightweight aggregate is expanded clay and/or expanded glass and/or pumice and/or foam glass and/or expanded slate and/or expanded perlite and/or expanded vermiculite and/or a lightweight aggregate containing cellulose fibers, e.g. wood and/or bamboo and/or hemp.
  • the dry mortar mixture can also contain at least one inactive or inert additive, preferably natural limestone powder and/or precipitated calcium carbonate (PCC).
  • at least one inactive or inert additive preferably natural limestone powder and/or precipitated calcium carbonate (PCC).
  • the dry mortar mixture has a total amount of aggregate(s) and inactive additive(s) of 35 to 65 mass-%, preferably 45 to 60 mass-%, based on the dry mass of the dry mortar mixture.
  • the dry mortar mixture can also contain fibers.
  • the fibers preferably have a length of 2 to 8 mm, preferably 5 to 6 mm.
  • the fibers preferably consist of plastic, preferably polypropylene, and/or mineral material.
  • the dry mortar mixture also has (apart from any fibres present) a maximum grain size of ⁇ 4 mm, preferably a maximum grain size of ⁇ 2 mm, preferably a maximum grain size of ⁇ 1 mm.
  • the dry mortar mixture also preferably comprises at least one additive, preferably at least one air entraining agent and/or at least one dispersing agent and/or at least one water retention agent, preferably methylcellulose.
  • the activated porous or foam concrete material can significantly improve the mechanical strength properties of the dry mortar mixture.
  • the dry mortar mixture in particular masonry mortar mixture, has a mortar compressive strength according to DIN EN 1015-11:2020-01 of 5 to 30 N/mm 2 , preferably 10 to 25 N/mm 2 .
  • the dry mortar mixture in particular masonry mortar mixture, also has a mortar flexural tensile strength according to DIN EN 1015-11:2020-01 of 2 to 5 N/mm 2 , preferably 3 to 4 N/mm 2 .
  • the dry mortar mixture preferably has a solid mortar density of 1 to 3 kg/dm 3 , preferably 1 to 2 kg/dm 3 , according to DIN EN 1015-10:2007-05.
  • the dry mortar mixture preferably has a dry bulk density of 0.8 to 2.5 kg/dm 3 , preferably 1 to 1.5 kg/dm 3 , particularly preferably 1.3 to 1.5 kg/dm 3 , according to DIN EN 1015-10:2007-05.
  • the fresh mortar properties of the dry mortar mixture according to the invention are not negatively influenced by the aerated or foam concrete material according to the invention.
  • the fresh mortar produced by mixing the dry mortar mixture according to the invention with water has a fresh mortar density according to DIN EN 1015-6:2007-05 of 1 to 3 kg/dm 3 , preferably of 1 to 2 kg/dm 3 .
  • the dry mortar mixture is preferably a masonry mortar.
  • the masonry mortar is used to As is known, a bed joint mortar layer of a masonry is produced.
  • the aerated concrete grains were dried to constant weight in a drying cabinet at a temperature of 105°C for 2 days.
  • a starting grain was prepared which contained the sulfate-containing aerated concrete grain PBK and the Portland cement in a ratio of 80:20 and the starting grain was ground.
  • the mixed regime was as follows: ⁇ b>Table 6: Mixing regime testing mortar mixers ⁇ /b> Step Designation Length of time 1 Filling time 30s 2 Mixing time 1 30s 3 Stripping time (no rotation) 30s 4 Mixing time 2 30s 5 Rest time (no rotation) 300s 6 Remixing time 5s
  • Test specimens in accordance with DIN EN 1015-11:2019 were produced from the fresh mortars.
  • Figure 1 shows a comparison of the relative measured values.
  • Figure 2 shows the increase in the mortar compressive strength of the dry mortar mixture according to the invention and the dry bulk density.
  • the second series of tests also showed a significant increase ( ⁇ 35 %) in the mortar compressive strength through the use of the activated aerated concrete material. Due to the use of the aerated concrete material, there was only a slight increase in the dry bulk density ( Figure 2 The measured mortar compressive strength of the reference mixture is comparable with the values of the first test series.
  • Drying the aerated concrete granulate to constant mass at around 105 °C is also sufficient to prevent hydration of the cement both in the grinding process and in the dry mortar mixture.
  • the activated aerated or foamed concrete material is an active or inert material actually depends on how it works in the dry mortar mixture mixed with water, which has not yet been clarified. If the activated aerated concrete material is at least somewhat equivalent to the binding agent used (e.g. Portland cement), it would be classified as a binding agent.
  • the binding agent used e.g. Portland cement
  • the activated porous or foam concrete material is considered to be an independent material due to its as yet unknown mode of action and is not classified as a binding agent, inert additives or aggregates.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP23213810.7A 2022-12-05 2023-12-01 Procédé de fabrication d'un matériau activé, utilisation du matériau dans un mélange de mortier sec, mélange de mortier sec comprenant le matériau, procédé de fabrication du mélange de mortier sec et son utilisation Pending EP4389716A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022213096.0A DE102022213096A1 (de) 2022-12-05 2022-12-05 Verfahren zur Herstellung eines aktivierten Materials, Verwendung des Materials in einer Trockenmörtelmischung, Trockenmörtelmischung mit dem Material, Verfahren zur Herstellung der Trockenmörtelmischung und deren Verwendung

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Publication Number Publication Date
EP4389716A1 true EP4389716A1 (fr) 2024-06-26

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KR19990001414A (ko) 1997-06-14 1999-01-15 정순착 경량기포 콘크리트(Autoclaved Light Weight Concrete)분쇄물을 이용한 단열몰탈 제조방법
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WO2009121635A1 (fr) 2008-04-04 2009-10-08 Xella Technologie- Und Forschungsgesellschaft Mbh Procédé de fabrication de béton poreux et de béton mousse, et installation pour la mise en œuvre du procédé
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CN103755258A (zh) 2013-12-31 2014-04-30 安徽省美域节能环保技术应用有限公司 防火保温水泥砂浆
CN103755260A (zh) 2013-12-31 2014-04-30 安徽省美域节能环保技术应用有限公司 轻质复合水泥砂浆
CN103803931A (zh) 2013-12-31 2014-05-21 安徽省美域节能环保技术应用有限公司 降噪保温水泥砂浆
CN103819162A (zh) 2013-12-31 2014-05-28 安徽省美域节能环保技术应用有限公司 一种增强型快干保温复合水泥砂浆
CN103951340B (zh) 2014-04-11 2015-12-30 天津天筑建材有限公司 一种低密度蒸压加气混凝土板专用修补砂浆
CN106116359A (zh) 2016-06-28 2016-11-16 北京建筑材料科学研究总院有限公司 一种蒸压加气混凝土板材专用快速修补砂浆及其制备方法与应用
DE202018105762U1 (de) 2017-10-25 2018-11-05 Povazská cementáren, a.s. Betonmischung
EP3670459A1 (fr) * 2015-12-21 2020-06-24 Omya International AG Composition chimique pour la production de particules sphériques en verre creux présentant une résistance élevée à la compression
CN111439964A (zh) 2020-01-06 2020-07-24 深圳市华威环保建材有限公司 一种利用废弃加气混凝土制备的干粉保温砌筑砂浆
EP3789362A1 (fr) 2019-09-03 2021-03-10 Xella Technologie- und Forschungsgesellschaft mbH Procédé de fabrication de corps moulés en béton cellulaire autoclavé ou cellulaire durcis par voie hydrothermique et de corps moulé en béton cellulaire autoclavé ou cellulaire
CN113213846A (zh) 2021-05-19 2021-08-06 哈尔滨工业大学（深圳） 一种水泥砂浆及其制备方法

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EP0117278B1 (fr) * 1983-01-29 1986-03-12 Anneliese Zementwerke AG Liant inorganique pour la fabrication de béton poreux
KR19990001414A (ko) 1997-06-14 1999-01-15 정순착 경량기포 콘크리트(Autoclaved Light Weight Concrete)분쇄물을 이용한 단열몰탈 제조방법
DE10351259A1 (de) * 2003-11-03 2005-06-16 Quick-Mix Gruppe Gmbh & Co. Kg Trockenmörtel
JP2006062927A (ja) 2004-08-30 2006-03-09 Asahi Kasei Construction Materials Co Ltd 軽量モルタル組成物
DE102006049836A1 (de) 2006-10-23 2008-04-24 Hochschule Neubrandenburg Verfahren zur Rückgewinnung und Verwendung hydraulisch erhärtender Bindemittel aus Baureststoffen, insbesondere Abbruchbeton
WO2009121635A1 (fr) 2008-04-04 2009-10-08 Xella Technologie- Und Forschungsgesellschaft Mbh Procédé de fabrication de béton poreux et de béton mousse, et installation pour la mise en œuvre du procédé
EP2336096B1 (fr) 2009-12-10 2013-03-06 Fels-Werke GmbH Pièce à base de mortier sec et son procédé de fabrication
DE102009058410B3 (de) 2009-12-16 2011-12-29 Fels-Werke Gmbh Dünnbettmörtel und dessen Verwendung
CN101781109B (zh) 2010-02-05 2012-04-25 江苏荣能集团有限公司 轻质干粉砌筑砂浆
RU2010144708A (ru) 2010-11-01 2012-05-10 Открытое акционерное общество "Сморгоньсиликатобетон" (BY) Сухая строительная смесь
CN103553488A (zh) 2013-10-14 2014-02-05 湖南科技大学 基于加气混凝土碎渣的保温砌体用砌筑砂浆及其制备方法
CN103613341A (zh) 2013-11-22 2014-03-05 苏州科技学院 一种基于蒸压砂加气混凝土废料的砌筑砂浆干粉料
CN103755258A (zh) 2013-12-31 2014-04-30 安徽省美域节能环保技术应用有限公司 防火保温水泥砂浆
CN103755260A (zh) 2013-12-31 2014-04-30 安徽省美域节能环保技术应用有限公司 轻质复合水泥砂浆
CN103803931A (zh) 2013-12-31 2014-05-21 安徽省美域节能环保技术应用有限公司 降噪保温水泥砂浆
CN103819162A (zh) 2013-12-31 2014-05-28 安徽省美域节能环保技术应用有限公司 一种增强型快干保温复合水泥砂浆
CN103951340B (zh) 2014-04-11 2015-12-30 天津天筑建材有限公司 一种低密度蒸压加气混凝土板专用修补砂浆
EP3670459A1 (fr) * 2015-12-21 2020-06-24 Omya International AG Composition chimique pour la production de particules sphériques en verre creux présentant une résistance élevée à la compression
CN106116359A (zh) 2016-06-28 2016-11-16 北京建筑材料科学研究总院有限公司 一种蒸压加气混凝土板材专用快速修补砂浆及其制备方法与应用
DE202018105762U1 (de) 2017-10-25 2018-11-05 Povazská cementáren, a.s. Betonmischung
EP3789362A1 (fr) 2019-09-03 2021-03-10 Xella Technologie- und Forschungsgesellschaft mbH Procédé de fabrication de corps moulés en béton cellulaire autoclavé ou cellulaire durcis par voie hydrothermique et de corps moulé en béton cellulaire autoclavé ou cellulaire
CN111439964A (zh) 2020-01-06 2020-07-24 深圳市华威环保建材有限公司 一种利用废弃加气混凝土制备的干粉保温砌筑砂浆
CN113213846A (zh) 2021-05-19 2021-08-06 哈尔滨工业大学（深圳） 一种水泥砂浆及其制备方法

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